US3716774A - Vehicle power supply system with voltage regulator load compensation - Google Patents

Vehicle power supply system with voltage regulator load compensation Download PDF

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Publication number
US3716774A
US3716774A US00168242A US16824271A US3716774A US 3716774 A US3716774 A US 3716774A US 00168242 A US00168242 A US 00168242A US 16824271 A US16824271 A US 16824271A US 3716774 A US3716774 A US 3716774A
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US
United States
Prior art keywords
voltage
output
regulating
power supply
generating means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00168242A
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English (en)
Inventor
M Lace
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Prestolite Electric Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Priority to US00168242A priority Critical patent/US3716774A/en
Priority to SE7208735A priority patent/SE372149B/xx
Priority to GB3197372A priority patent/GB1391856A/en
Priority to JP47071206A priority patent/JPS5130923B2/ja
Priority to IT51611/72A priority patent/IT965919B/it
Priority to NL7210465A priority patent/NL7210465A/xx
Priority to DE19722238066 priority patent/DE2238066C3/de
Priority to FR7227881A priority patent/FR2148202B1/fr
Application granted granted Critical
Publication of US3716774A publication Critical patent/US3716774A/en
Assigned to PRESTOLITE ELECTRIC INCORPORATED, FOUR SEAGATE, TOLEDO, OHIO, A CORP. OF DE reassignment PRESTOLITE ELECTRIC INCORPORATED, FOUR SEAGATE, TOLEDO, OHIO, A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MOTOROLA, INC.
Anticipated expiration legal-status Critical
Assigned to PEI 1991 ACQUISITION, INC. reassignment PEI 1991 ACQUISITION, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PRESTOLITE ELECTRIC INCORPORATED
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
    • H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/16—Regulation of the charging current or voltage by variation of field

Definitions

  • a power supply system for a vehicle providing power to a load remotely located therefrom and connected to the system by conductors having a predetermined voltage loss includes an electronic regulator circuit 322,28 322,79 which controls the output voltage of the system.
  • the Int-Clam The Int-Clam.
  • a IIIIIIIIIIIII 6 9/30 regulator circuit is connected to sense the voltage [58] Field of l' 73 drop across a rectifying diode connected to the output 6 of the AC generator of the system, which varies in aci a cordance with the current output'of the generator, References Cited and in accordance therewith varies the output voltage i of the system to compensate for the loss in said con- UNITED STATES PATENTS ducwrs- 3,593,102 *7/1971 .Kawashima ..322/28 8 Claims, l Drawing Figure Q L- J Cali TEE ⁇ l2 FIELD 1 EXCITATION CIRCUIT mmmrmm INVENTORI MELVIN A.
  • LACE VEHICLE POWER SUPPLY SYSTEM WITH VOLTAGE REGULATOR LOAD COMPENSATION BACKGROUND OF THE INVENTION This invention relates generally to power supply systems used in vehicles and more particularly to voltage regulator circuitry for use with such systems for controlling the output thereof to power an electrical load.
  • Vehicle alternator systems generally employ a voltage regulator to assure that the output voltage from the alternator is suitable for proper charging of the vehicle battery and to power electrically operated accessories therein.
  • the voltage regulator is mounted normally near the alternator in the engine compartment of the vehicle. In the case where the battery to be charged is also mounted in the engine compartment in close proximity to the alternator, satisfactory charging thereof is obtained.
  • the voltage loss of the cables connecting the battery to the alternator can be of sufficient magnitude that the actual voltage applied to the terminals of the battery is substantially less than the output voltage of the alternator. The latter causes poor charging of the battery and may, in some cases, permit the battery to become discharged.
  • a preferred embodiment of the vehicle power supply system includes electronic voltage regulator circuitry operable to control the supply of charging current from an alternator to a remotely situated battery or electrical load.
  • the regulator circuitry is connected to one of the output phases of the alternator. The connection may be accomplished either directly or through a diode and to a phase leading the phase providing excitation current to the field.
  • the phase voltage at the phase connected to the regulator circuit becomes negative, on negative half-cycles of the generated alternating current, current flows through the negatively poled rectification diode connected to the phase, thereby clamping the regulator connection to a negative voltage equal to one diode junction drop below ground.
  • the diode drop is a first predetermined value.
  • the diode drop will increase due to the increased current flow through the diode.
  • the ground reference for the voltage regulator circuit which is used to drive the field excitation circuit has a variable reference voltage.
  • FIGURE of the drawing is a schematic diagram illustrating a vehicle power supply system according to the invention, generally designated by the numeral 10 for supplying current to an electrical load, which requires constant voltage, herein taking the form of a battery 12.
  • the battery 12 is connected to the power supply system 10 via cables or conductors l4, 16 which are shown in broken lines to represent the fact that they are significantly long, such as, for example, of a length normally found in a semi-trailer truck or the like vehicle.
  • the power supply system 10 includes the usual elements such as an AC voltage generator or alternator 18 having a stator 20 including three phase windings 20a, 20b, 20cshown for illustrative purposes only in a delta configuration, and a rotatable field winding 22.
  • the AC output of the alternator is fed via output leads 24, 26, 28 through the usual full wave rectification arrangement 30 including two sets of three oppositely poled diode rectifiers 32, 34, 36 and 38, 40, 42, respectively, to leads 14,16 connected to battery 12.
  • An electronic voltage regulator 23 is employed in the vehicle power supply system according to the invention to control the output of the alternator 18.
  • the regulator circuit includes a transistor 44 having a grounded emitter electrode 46 and a collector electrode 48 connected through a resistor 50, lead 51 and a three phase rectifying circuit 52 to the output leads 24, 26, 28 of the alternator.
  • the base electrode 54 of the transistor is connected through a zener diode 56 and a voltage divider network 57 including resistors 58, 60 and is connected via lead 62 at junction 63 to output lead 24 and one of the phase windings (20a) of the alternator 18.
  • the output lead 64 of the transistor 44 of the regulator circuit is connected to a field excitation circuit 66 of a conventional type which is connected over lead 68 to one side of the field winding 22 of the alternator; the opposite side of the field winding being connected to ground potential.
  • a lead 70 connected to another output lead 26 of the alternator 18 is connected to the fieldexcitation circuit 66 also forpassing excitation current to the field winding 22 when necessary, as controlled by the regulator 23.
  • the rectified output of the alternator stator winding is fed via lead 51 to the regulator circuit.
  • the voltage is divided down by network 57 and applied at junction 72.
  • the zener diode 56 connected thereat has a predetermined breakdown voltage which when exceeded by the voltage applied thereto, causes it to breakdown, thereby to operate transistor 44.
  • the operation of transistor 44 in turn causes the field excitation circuit 66 to turn off and interrupt the flow of ternator via lead 70 to the field winding 22.
  • the regulator circuit 23, as described heretofore, is connected via lead 62 at junction 63 to an output lead of another of the phases (20a) of the alternator stator winding 20. Since the forward voltage drop across the rectifier diodes 3242 is dependent on the current supplied by the alternator, the voltage at junction 63 changes proportionally thereto as well. When the voltage at junction 63 becomes negative, on negative half-cycles of the generated AC, current flows through diode 42, thereby clamping junction 63 to a negative voltage equal to one diode drop below ground. When no current is being drawn by the battery 12, the diode drop is at a predetermined value, herein approximately 0.7 volts.
  • the diode drop increases herein to approximately l.2 volts, due to increased current flow through diode 42.
  • the voltage at junction 72, which controls the operation of zener diode 56 is varied in accordance with current being drawn from the alternator.
  • the increased negative voltage applied to resistor 60 delays the tum-on time of zener diode 56, thereby increasing the length of time the field is excited by the field excitation circuit. The latter increases the alternator output voltage to compensate for the voltage loss due to the long cables 14, 16.
  • therectification diodes may be chosen with specific voltage drops for cables of varying lengths.
  • the selection of particular diodes for corresponding cable lengths will be obvious to one skilled in the art.
  • the values of 0.7 volts and 1.2 volts with regard to the voltage drop across diode 42 shown in the figure of the drawing is a typical example for a standard semi-trailer type truck using standard length cables.
  • alternator output phase to which the connection (lead 62) to the regulator circuit is made must lead the voltage of the supplying excitation current to the field for efficient regulation of the output of the system.
  • a diode 74 shown in dotted lines, may be inserted into lead 62 to prevent positive voltages from the alternator from turning on transistor 44 inadvertently. This diode is required with some forms of field excitation circuits.
  • the vehicle power supply system provides a relatively simple, efficient means for supplying current to a load requiring constant voltage, and which is located remotely from the system and connected thereto over relatively long conductors or cables.
  • a power supply system for supplying a remotely positioned electrical load requiring a constant voltage, said load being connected to said system by elongated conductors of a predetermined length having a predetermined voltage loss, said system including in combination: AC voltage generating means having an output, rectifying means connected to said output and to said electrical conductors, and regulating means connected to said voltage generating means for regulating the latter to provide a corresponding voltage output from said system, said regulating means being coupled to the output of said generating means for sensing the voltage drop across said rectifying means, said regulating means varying the output voltage of said system proportionally to the voltage drop so as to compensate substantially for the voltage loss in said elongated conductors.
  • a vehicle power supply system for providing charging current to a remotely located electrical load, said electrical load being connected electrically to said system via conductors having a predetermined voltage loss
  • said system including in combination: an AC voltage generating means having a three phase output rectifying means including a plurality of diode means, connected to the output phases of said generating means and to said electrical conductors for supplying a rectified output to said load, each of said diode means having a voltage drop thereacross which varies in accordance with the current output of said generating means, and regulating means connected to said system for regulating the output thereof to provide a predetermined output voltage, said regulating means connected to one of said phases for sensing the voltage drop across a corresponding diode means, said regulating means varying the level of said output voltage proportionally to the voltage drop across said diode means, thereby to compensate for the voltage loss of said electrical conductors.
  • said regulating means includes means for setting a reference voltage forlimiting the output voltage of said system, wherein said regulating means senses the output voltage of said system and compares a sensed voltage with said reference voltage for controlling the output voltage and wherein said diode means include a negatively poled rectifying diode having a negative voltage drop, said negative voltage drop decreasing the value of the voltage sensed by the regulating means, thereby increasing the output voltage ac-' co'rdingly.
  • a power supply system for providing power to an electrical load requiring a constant voltage, remotely located from said system and connected thereto hy elongated electrical conductors having a predetermined voltage loss, said system including in combination: AC generating means, rectifying means connected to the output of said generating means and said elongated conductors, the voltage drop across said rectifying means varying with the current output of said generating means, and regulating means for controlling the output voltage of said system, said regulating means being connected to sense the voltage drop across said rectifying means and to vary the output voltage of said system in accordance therewith, thereby to compensate for the voltage loss in said elongated electrical conductors.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Charge By Means Of Generators (AREA)
  • Control Of Voltage And Current In General (AREA)
US00168242A 1971-08-02 1971-08-02 Vehicle power supply system with voltage regulator load compensation Expired - Lifetime US3716774A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00168242A US3716774A (en) 1971-08-02 1971-08-02 Vehicle power supply system with voltage regulator load compensation
SE7208735A SE372149B (enrdf_load_html_response) 1971-08-02 1972-07-03
GB3197372A GB1391856A (en) 1971-08-02 1972-07-07 Power supply system
JP47071206A JPS5130923B2 (enrdf_load_html_response) 1971-08-02 1972-07-15
IT51611/72A IT965919B (it) 1971-08-02 1972-07-18 Circuito regolatore di tensione per il sistema di alimentazione elettrica per veicoli
NL7210465A NL7210465A (enrdf_load_html_response) 1971-08-02 1972-07-28
DE19722238066 DE2238066C3 (de) 1971-08-02 1972-08-02 Stromversorgungseinrichtung, vorzugsweise für Lastkraftfahrzeuge
FR7227881A FR2148202B1 (enrdf_load_html_response) 1971-08-02 1972-08-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00168242A US3716774A (en) 1971-08-02 1971-08-02 Vehicle power supply system with voltage regulator load compensation

Publications (1)

Publication Number Publication Date
US3716774A true US3716774A (en) 1973-02-13

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US00168242A Expired - Lifetime US3716774A (en) 1971-08-02 1971-08-02 Vehicle power supply system with voltage regulator load compensation

Country Status (7)

Country Link
US (1) US3716774A (enrdf_load_html_response)
JP (1) JPS5130923B2 (enrdf_load_html_response)
FR (1) FR2148202B1 (enrdf_load_html_response)
GB (1) GB1391856A (enrdf_load_html_response)
IT (1) IT965919B (enrdf_load_html_response)
NL (1) NL7210465A (enrdf_load_html_response)
SE (1) SE372149B (enrdf_load_html_response)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863138A (en) * 1973-09-13 1975-01-28 Motorola Inc One element voltage supply device
US3868558A (en) * 1972-10-11 1975-02-25 Lucas Electrical Co Ltd Battery charging systems
US3984755A (en) * 1975-12-02 1976-10-05 General Motors Corporation Voltage regulator
US3997833A (en) * 1974-06-24 1976-12-14 Kokusan Denki Co., Ltd. Voltage regulator for a magneto AC generator
US4847545A (en) * 1987-10-27 1989-07-11 Donald Reid Method and an apparatus for boosting battery
WO1990012449A1 (de) * 1989-04-01 1990-10-18 Robert Bosch Gmbh Bordnetz
US5182510A (en) * 1989-05-22 1993-01-26 Sanshin Kogyo Kabushiki Kaisha Charging system
US5194800A (en) * 1989-04-01 1993-03-16 Robert Bosch Gmbh Power supply system
US20130248165A1 (en) * 2012-03-21 2013-09-26 Thermo King Corporation Power regulation system for a mobile environment-controlled unit and method of controlling the same
US10381862B2 (en) * 2016-06-02 2019-08-13 Murata Manufacturing Co., Ltd. Battery module voltage control device, battery module, and power supply system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5367844A (en) * 1976-11-29 1978-06-16 Shibaura Eng Works Ltd Current detector for protecting overcurrent of compound generator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069616A (en) * 1958-08-05 1962-12-18 Motorola Inc Voltage regulator for generators
US3521148A (en) * 1963-09-20 1970-07-21 Gen Motors Corp Semiconductor voltage regulator for a generator with main and bucking field windings
US3593102A (en) * 1968-05-16 1971-07-13 Nippon Denso Co Semiconductor voltage regulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069616A (en) * 1958-08-05 1962-12-18 Motorola Inc Voltage regulator for generators
US3521148A (en) * 1963-09-20 1970-07-21 Gen Motors Corp Semiconductor voltage regulator for a generator with main and bucking field windings
US3593102A (en) * 1968-05-16 1971-07-13 Nippon Denso Co Semiconductor voltage regulator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868558A (en) * 1972-10-11 1975-02-25 Lucas Electrical Co Ltd Battery charging systems
US3863138A (en) * 1973-09-13 1975-01-28 Motorola Inc One element voltage supply device
US3997833A (en) * 1974-06-24 1976-12-14 Kokusan Denki Co., Ltd. Voltage regulator for a magneto AC generator
US3984755A (en) * 1975-12-02 1976-10-05 General Motors Corporation Voltage regulator
US4847545A (en) * 1987-10-27 1989-07-11 Donald Reid Method and an apparatus for boosting battery
WO1990012449A1 (de) * 1989-04-01 1990-10-18 Robert Bosch Gmbh Bordnetz
US5194800A (en) * 1989-04-01 1993-03-16 Robert Bosch Gmbh Power supply system
US5182510A (en) * 1989-05-22 1993-01-26 Sanshin Kogyo Kabushiki Kaisha Charging system
US20130248165A1 (en) * 2012-03-21 2013-09-26 Thermo King Corporation Power regulation system for a mobile environment-controlled unit and method of controlling the same
US9562715B2 (en) * 2012-03-21 2017-02-07 Thermo King Corporation Power regulation system for a mobile environment-controlled unit and method of controlling the same
US10381862B2 (en) * 2016-06-02 2019-08-13 Murata Manufacturing Co., Ltd. Battery module voltage control device, battery module, and power supply system

Also Published As

Publication number Publication date
JPS4824212A (enrdf_load_html_response) 1973-03-29
SE372149B (enrdf_load_html_response) 1974-12-09
DE2238066A1 (de) 1973-02-22
DE2238066B2 (de) 1976-02-26
NL7210465A (enrdf_load_html_response) 1973-02-06
FR2148202B1 (enrdf_load_html_response) 1977-04-01
IT965919B (it) 1974-02-11
FR2148202A1 (enrdf_load_html_response) 1973-03-11
GB1391856A (en) 1975-04-23
JPS5130923B2 (enrdf_load_html_response) 1976-09-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: PRESTOLITE ELECTRIC INCORPORATED, FOUR SEAGATE, TO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MOTOROLA, INC.;REEL/FRAME:004997/0236

Effective date: 19871116

AS Assignment

Owner name: PEI 1991 ACQUISITION, INC.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PRESTOLITE ELECTRIC INCORPORATED;REEL/FRAME:005967/0628

Effective date: 19911029

Owner name: PEI 1991 ACQUISITION, INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PRESTOLITE ELECTRIC INCORPORATED;REEL/FRAME:005967/0628

Effective date: 19911029